Investment Benefit And Correlation Degree Research Between Gas And Coal Fired Cogeneration Project

Project investment benefit evaluation is an important link in the life cycle of the project.Evaluation of the project investment benefit is helpful for seizing the key elements that influence the investment benefit. Besides, it is also helpful for summarizing the experiences of project management and improving the project management and decision level. The forms of city power generation includes gas cogeneration and coal fired cogeneration. Their investment returns has its own characteristics. With the domestic coal market downturn in recent years, the investment cost of the coal-fired cogeneration project is decreasing. But this project leads to large emissions of greenhouse gases and environmental pollution.In recent years, gas cogeneration project is a new power generation projects. The project requires higher input costs in the preceding period. However, it belongs to clean energy generation projectsbecause it implements the greenhouse gas emissions and brings better environmental benefits. In domestic and foreign, the investment cost and receipts are measure analysis of investment efficiency of coal-firedcogeneration project. But the less analytical standards are analyzed by environment and the repayment ability. Therefore, in order to effectively predict the trends of project investment efficiency and determine a reasonable investment objectives, it is necessary that we construct a universal investment efficiency indicators of coal-firedcogeneration project and a systematic method of investment-benefit analysis.This dissertation chooses a gas cogeneration project and a coal fired cogeneration project which have the same amount of investment in aheat power plant as the research background. The related factors that affecting the investment benefit of the gas and coal fired cogeneration project are analyzed.The innovation points of this dissertation are as follows. Firstly, an investment benefitindex systemwhich is applicable to the gas cogeneration projectand coal fired cogeneration project is established form the aspect of cost, discharge capacity, profitability and environmental benefit. Secondly, the investment benefit of the gas cogeneration projectand coal fired cogeneration project is analyzed from the four ascepts. From the analysis we can get the conclusion that coal projects have an advantage over gas projects in terms of fuel costs. But the coal project long-term investment income gradually slow down. The gas project has no longer competitive advantages in the solvency, profitability, environmental benefits. On the whole, from the investment benefit analysis and correlation trend research between gas and coal fired cogeneration project, we can get the conclusion that the gas cogeneration project with the same investment has more advantages in comprehensive investment benefit than the coal-fired projects.Thirdly, the AHP-Entropy method is estavlished to calculate the comprehensive weight of the index of the gas and coal fired cogeneration project. Based on the comprehensive weight formula, the comprehensive weightof the investment benefit evaluation index system for the gas and coal fired cogeneration project is calculated and analyzed. The index weight and the gray correlation analysis method is combounded to establish an investment benefit model forthe gas and the coal fired cogeneration project. The gray weighted correlation degree of the investment benefit of the gas cogeneration project and the coal fired cogeneration projectare calculated. The weighted gray correlation trend of the investment benefit for the gas cogeneration project and the coal fired cogeneration projectare analyzed.